Eight tasks addressing the architect's two [high] drift items
(lambda-captures-of-mut-var diagnostic + codegen comment cleanup),
two [medium] items (stale mut.1-stub history comments in DESIGN.md
and codegen), plus the bench compile_check.py check_ms regression
(~30-50% relative; closed by short-circuiting the empty
mut_scope_stack walk in synth's Term::Var arm).
Architect's [low] item (prose render of MutVar drops type
annotation) deliberately deferred per architect recommendation —
prose surface design is itself pending.
Plan unblocks the follow-on Stateful-islands milestone (effect-
handler infrastructure + !Mut + refs) per architect gate.
Brummel
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